Enhanced laser-induced plasma channels in air  

作　　者：左言磊 魏晓峰 周凯南 曾小明 粟敬钦 焦志宏 谢娜 吴朝辉 

机构地区：[1]Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China [2]Science and Technology on Plasma Physics Laboratory, Mianyang 621900, China [3]IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Chinese Physics B》2016年第3期256-261,共6页中国物理B（英文版）

基　　金：Project supported by the Development Foundation of the Chinese Academy of Engineering Physics(Grant Nos.2012A0401019 and 2013A0401019)

摘　　要：Plasma is a significant medium in high-energy density physics since it can hardly be damaged. For some applications such as plasma based backward Raman amplification （BRA）, uniform high-density and large-scale plasma channels are required. In the previous experiment, the plasma transverse diameter and density are 50-200 μm and 1-2 x 10^19 cm-3, here we enhance them to 0.8 mm and 8 x 10^19 cm-3, respectively. Moreover, the gradient plasma is investigated in our experiment. A proper plasma gradient can be obtained with suitable pulse energy and delay. The experimental results are useful for plasma physics and nonlinear optics.Plasma is a significant medium in high-energy density physics since it can hardly be damaged. For some applications such as plasma based backward Raman amplification （BRA）, uniform high-density and large-scale plasma channels are required. In the previous experiment, the plasma transverse diameter and density are 50-200 μm and 1-2 x 10^19 cm-3, here we enhance them to 0.8 mm and 8 x 10^19 cm-3, respectively. Moreover, the gradient plasma is investigated in our experiment. A proper plasma gradient can be obtained with suitable pulse energy and delay. The experimental results are useful for plasma physics and nonlinear optics.

关 键 词：plasma channel laser-induced plasma plasma measurement plasma optics 

分 类 号：O53[理学—等离子体物理]